Preparation

Stir together 2 tablespoons oil, garlic, oregano, and 1/4 teaspoon each of salt and pepper.

Heat grill pan over medium heat until hot.

Brush 1 side of each bread slice with some of garlic oil and put, oiled side down, on a work surface. Brush chicken with remaining garlic oil, then grill chicken, turning once, until just cooked through, 2 to 3 minutes total. Put
chicken on a bread slice, then top with cherry peppers, mozzarella, and remaining bread slice, oiled side up.

Put sandwich in grill pan and weight with a heavy skillet. Cook, turning
once, until cheese has melted and bread is golden, about 4 minutes total.